CRANKCASE 1W6471 - Caterpillar

Active Diagnostic CodeDescribes a condition that is currently present to alert the operator or service Technician of an abnormal engine operation parameter. Refer to Diagnostic Fault Code.Aftermarket DeviceAs used here, a device or accessory installed by the customer or vessel OEM after the engine is delivered.Air To Air Aftercooler (ATAAC)A means of cooling inlet air after the turbocharger, using ambient air for cooling. The inlet air is passed through an aftercooler (heat exchanger) mounted in front of the radiator before going to the inlet manifold.Alternating Current (AC)The direction of current flow changes (alternates) regularly and constantly in a circuit.American Wire Gauge (AWG)A measure of the diameter (and therefore the current carrying ability) of electrical wire. The smaller the AWG number, the larger the wire.Atmospheric Pressure SensorThe Atmospheric Pressure Sensor monitors atmospheric pressure. Atmospheric Pressure sensing is used to reduce smoke emissions at high altitudes. The ECM optimizes timing bases on engine operating conditions. The sensor operates on +5 VDC supplied through pin-36 of the ECM connector J2/P2.Boost Pressure SensorRefer to Inlet Air Manifold Pressure Sensor.Breakout T HarnessA test harness designed to connect into a machine or engine harness which allows normal circuit operation while providing a breakout or T to measure signals.Bypass CircuitA circuit, usually temporary, to substitute for an existing circuit, typically for test purposes.CalibrationAs used here, is an electronic adjustment of a sensor signal.CAT Data LinkA two wire electrical connection for communication with other microprocessor based devices such as EMS II. The Data Link is also the serial communication medium used for programming and troubleshooting with Caterpillar Electronic Service Tools.Caterpillar Engine MonitoringThe part of the Electronic Control Module that monitors Coolant Temperature, Filtered Fuel Pressure, Inlet Manifold Air Temperature and Coolant Level to alert the operator of detected problems. The Coolant Temperature, Inlet Manifold Air Temperature, and Filtered Fuel Pressure Sensors are supplied by Caterpillar and monitored by the ECM. The Coolant Level Sensor is vessel OEM installed, but still monitored by the ECM. Aftermarket engine monitoring systems do not interface with the Caterpillar Electronic Engine Control Module.Check Engine LampSometimes referred to as the "Diagnostic Lamp", it is used to alert the operator of the presence of an active event and is used to flash a diagnostic code.CodeRefer to Diagnostic Fault Code.Cold ModeA mode of engine operation where the timing is retarded and the low idle may be raised for engine protection, reduced smoke emissions and faster warm up time.Component Identifier (CID)Two or three digit code which is assigned to each component to identify data via data link to ECM. Coolant Level SensorThis OEM installed sensor detects the absence/presence of coolant at the probe and sends a signal to the ECM.Coolant Temperature SensorThe Coolant Temperature Sensor measures the temperature of the engine coolant. The ECM uses this information to determine the mode of operation and if Caterpillar Engine Monitoring is not programmed to the OFF mode, to notify the operator of excessive engine temperature. The sensor operates on +5 VDC supplied through pin-36 of the ECM